supply of amc of gps based tracking device after expiry of warranty period of 1 year. amc period is 02 years. as per p.o , gps based tracking device pre-installed sim for monitoring of track patrolling along with mapping, customization in software, software installation, android app, report generation and related assistance as per specification. technical eligibility criteria, definitions & abbreviations and methodology & formats for data transfer / exchange between pd & central server as annexure-1. after 1 year sim renewal has to be done for 2nd and 3rd year. as per p.o [ warranty period: 30 months after the date of delivery ]